Detection method of excessive heavy metals in soil
A detection method and heavy metal technology, applied in the field of electrochemical detection in the environment, can solve the problems of high equipment cost, difficult mass production, complex detection process, etc.
Inactive Publication Date: 2018-10-16
SHANGHAI DONGZHOU IND
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Problems solved by technology
The invention can accurately detect the excessive content of heavy metals in the soil, but the detection process is complicated, the equipment cost is high and it is difficult to mass-produce
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[0021] A method for detecting excessive heavy metals in soil; it includes two layers of electrodes with an electrochromic structure, a conductive ion solution, and an electrochromic membrane treated with an ion membrane; by placing the treated electrochromic membrane between the two layers of electrodes , the electrode connected to the positive pole is defined as an anode, and the electrode connected to the negative pole is defined as a cathode; the treated conductive ions are placed in the anode area, and the treated electrochromic material is placed in the cathode area; the detection method is in After the voltage is applied to both ends of the kit, the probability of discoloration rate through the measuring device is defined as the initial discoloration rate; after fading, the discoloration returns to the initial state, and then the soil sample to be tested is dried, and the sample is hydrolyzed with an acidic solution, and treated with an aqueous solution. Form into the ano...
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The invention discloses a detection method of excessive heavy metals in soil. According to the detection method, by virtue of the conductive characteristic of heavy metal ions and structural advantages of an electrochromic device, soil to be detected is prepared into a detection stock solution through drying, acid hydrolysis and other processes, and the discoloration probability of the device is measured as an initial discoloration rate after voltage is applied to the two ends of a kit; after discoloration, a sample solution required to be tested is added to an anode, the conductive heavy metal ions in the sample move to a cathode through an ionic membrane under the action of current, then charges are transferred to an electrochromic material to achieve increase or decrease in the discoloration rate, and then a measured discoloration rate is compared with the initial discoloration rate to obtain a qualitative and quantitative detection result. By the detection method, a rapid and visual inspection result can be achieved; in addition, equipment is light and convenient, a monitoring technology is simple, the equipment is easy to carry, and strong advantages are achieved in the fieldof field soil detection; meanwhile, the detection method has a good application prospect in the public safety fields such as sewage heavy metal detection and food heavy metal detection.
Description
technical field [0001] The invention belongs to the application of electrochemistry in the field of environmental detection. Background technique [0002] With the continuous development of modern industrial technology and the aggravation of environmental pollution, the problem of soil pollution has attracted more and more attention in recent years. Especially heavy metal element pollution, the content of trace metal elements in the soil exceeds the background value, and the excessive content caused by excessive deposition will eventually lead to food safety. It accumulates in plants, animals and humans through the food chain, and poses a serious threat to the ecological environment, food safety and human health. Therefore, strengthening the monitoring and control of heavy metals in farmland soil is of great significance for the effective prevention and control of heavy metal pollution. [0003] The traditional soil heavy metal detection method is to take soil samples and ...
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IPC IPC(8): G01N21/66
CPCG01N21/66
Inventor 郭素文郑岩陈磊全丽华陈君燕耿树范范宏伟刘洁周金水
Owner SHANGHAI DONGZHOU IND